It was a shocking experience when I was notified (by some regular customers) that my website was hacked.
Immediately I went to my site and noticed that some trojan virus showed up.
Due to my good visusscan it couldn't do any harm.
Then I tried to restore the index and home page, in which I succeeded.
But after some days it happened again.
Together with my provider we took some pecautions.
So I hope that it will never happen again.
There are people out there who have pleasure in doing such deeds. Very pathetic folks.